as worshippers were leaving mosques. al-jazeera dana zudar has more. >> they finished friday prayers. then panic struck. security cameras caught the explosion. two one of two mosques. theplosions were minutes apart. dozens of people were killed and injured. there was no claim of responsibility, but officials say the attacks had one objective: to create sectarian strife in lebanon. tripoli is predominantly sunni and many people are supporters of the opposition. >> this is the work of the syrian government. they targeted us. they gave a message to the sunnis in the north. but we won't be threatened. we will retaliate. >> it is a dangerous time for lebanon. these bombings are seen as an attack against sunnis. last week, a powerful explosion killed civilians and has a strong hold in beirut. s hezbollah is fighting. this is a country polarized by the syrian war. and tripoli is a volatile city. those opposing have engaged in gun battles many times in the past. it is a time of heightened tensions. the blasts were not unexpected. a few days ago, the lebanese army stepped up security across the country.